写作就是面对存在的混乱并强加某种秩序。

A proof is a device for convincing someone else that a mathematical statement is true.

We change our behavior when the pain of staying the same becomes greater than the pain of changing.

世界上最大的空间是改进的空间。

伟大的领导者愿意做出他人回避的艰难决定。